--source include/invisible_indexes.inc

--echo #
--echo # Tests that don't work on MyISAM ( native partitioning, indexes on
--echo # generated columns, etc.)
--echo #

--echo #
--echo # Partitioning on keys with an invisible index, invisible indexes over
--echo # partitioned tables.
--echo #
CREATE TABLE t1 (
  a CHAR(2) NOT NULL,
  b CHAR(2) NOT NULL,
  c INT(10) UNSIGNED NOT NULL,
  d VARCHAR(255) DEFAULT NULL,
  e VARCHAR(1000) DEFAULT NULL,
  KEY (a) INVISIBLE,
  KEY (b)
) PARTITION BY KEY (a) PARTITIONS 20;

INSERT INTO t1 (a, b, c, d, e) VALUES
('07', '03', 343, '1', '07_03_343'),
('01', '04', 343, '2', '01_04_343'),
('01', '06', 343, '3', '01_06_343'),
('01', '07', 343, '4', '01_07_343'),
('01', '08', 343, '5', '01_08_343'),
('01', '09', 343, '6', '01_09_343'),
('03', '03', 343, '7', '03_03_343'),
('03', '06', 343, '8', '03_06_343'),
('03', '07', 343, '9', '03_07_343'),
('04', '03', 343, '10', '04_03_343'),
('04', '06', 343, '11', '04_06_343'),
('05', '03', 343, '12', '05_03_343'),
('11', '03', 343, '13', '11_03_343'),
('11', '04', 343, '14', '11_04_343');

ANALYZE TABLE t1;

EXPLAIN SELECT a FROM t1;
EXPLAIN SELECT b FROM t1;
EXPLAIN SELECT * FROM t1 WHERE a = '04';

ALTER TABLE t1 ALTER INDEX a VISIBLE;
EXPLAIN SELECT a FROM t1;
EXPLAIN SELECT * FROM t1 WHERE a = '04';

ALTER TABLE t1 ALTER INDEX b INVISIBLE;
EXPLAIN SELECT b FROM t1;

DROP TABLE t1;

CREATE TABLE t1 ( a INT GENERATED ALWAYS AS (1), KEY (a) INVISIBLE );
SHOW INDEXES FROM t1;
EXPLAIN SELECT a FROM t1;
DROP TABLE t1;


--echo #
--echo # Test that referential constraints implemented by the indexes are still
--echo # enforced while the index is invisible.
--echo #

CREATE TABLE t1p ( a INT KEY );
CREATE TABLE t1c ( t1p_a INT );
ALTER TABLE t1c ADD CONSTRAINT FOREIGN KEY ( t1p_a ) REFERENCES t1p( a );
ALTER TABLE t1c ALTER INDEX t1p_a INVISIBLE;

--error ER_NO_REFERENCED_ROW_2
INSERT INTO t1c VALUES ( 1 );
SELECT * FROM t1c;

DROP TABLE t1c, t1p;

--echo #
--echo # Bug#25837038: FEATURE REQUEST : USE INVISIBLE INDEXES SPECIFIC QUERY
--echo #

CREATE TABLE t1 ( a INT, KEY( a ) INVISIBLE );

INSERT INTO t1 VALUES (1), (2), (3), (4), (5), (6), (7), (8), (9), (10);
--replace_column 10 X
EXPLAIN SELECT a FROM t1;

--connect ( con1, localhost, root, , )
--connection con1
SELECT @@optimizer_switch;
--replace_column 10 X
EXPLAIN SELECT a FROM t1;
SET @@optimizer_switch='use_invisible_indexes=on';
--replace_column 10 X
EXPLAIN SELECT a FROM t1;

--connection default
SELECT @@optimizer_switch;
--replace_column 10 X
EXPLAIN SELECT a FROM t1;

--connection con1
SELECT @@optimizer_switch;
SET @@optimizer_switch='use_invisible_indexes=off';
--replace_column 10 X
EXPLAIN SELECT a FROM t1;

--disconnect con1
--connection default
--replace_column 10 X
EXPLAIN SELECT a FROM t1;

DROP TABLE t1;